Have a question about the start/stop system. I am probably one of the few people that actually likes the stop/start system so it seems ironic that it rarely works on our 2018 Chrysler Pacifica. The aux battery died once under warranty and was replaced. It worked for a while after the battery replacement and then more or less stopped working. It mostly just gives the message "Stop/start battery charging" and would randomly work one day and then not work again for months. I had it checked one last time before the warranty was up and they said there was nothing wrong with the battery or the system. It took a good year and a half after the warranty was up before the second aux battery finally died, and of course it was like 4 months after the 3 year warranty officially ended on the replacement battery. No biggie. $100 and 10 minutes worth of work and the new battery is in AFTER I made sure it was fully charged on my battery tender. No more code but the stop/start still didn't work and still just said "Stop/start battery charging." Took a month of driving before it randomly worked for one day and then has not worked again since. Anybody have any idea what is up? Is there a reflash available that makes it a little less sensitive to battery voltage/current? The dealership won't do anything or tell me anything without me paying them a $170 diagnostic fee and I did not find a TSB dealing with this issue.
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